MI Windows & Doors manufactures vinyl, aluminum and cellular composite windows and doors for customers throughout the United States. For more than 50 years, the company has provided its products to distributors, architects, builders and homeowners. The company manufactures replacement, commercial, storm and new construction products under the brand names Capitol, BetterBilt, Insight and Xact. Customers can choice from architectural, double-hung, single-hung, sliding, rolling patio and aluminum windows and doors. Its vinyl selection includes awning, basement, bow, bay, casement and combination windows and doors. Founded in 1972, MI Windows & Doors is headquartered in Millen, Ga., and maintains manufacturing, sales and distribution facilities throughout the United States, including one in Gratz, Pa.